# FastFlow vs Calorie Ledger Book

The clearest difference is update cadence: Calorie Ledger Book at every 9 days against FastFlow's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. FastFlow sells 2 in-app purchases, starting at $2.99 per month and Calorie Ledger Book sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

FastFlow ships an update every 4 months, Calorie Ledger Book every 9 days. The most recent releases landed on October 30, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | FastFlow | Calorie Ledger Book |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Size | 2 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Renzo Ohhama](https://appshunter.io/developer/1812551739) | [Atsushi Takahashi](https://appshunter.io/developer/6806662954) |

## What reviewers say

### FastFlow

[App page](https://appshunter.io/ios/app/fastflow/id6755752536)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FastFlow Premium - Monthly | $2.99 | per month |
| FastFlow Premium - Yearly | $22.99 | per year |


### Calorie Ledger Book

[App page](https://appshunter.io/ios/app/calorie-ledger-book/id6806662952)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $3.99 | per month |
| Premium (Yearly) | $29.99 | per year |


## Frequently asked questions

### Is FastFlow free?

FastFlow is free to download, with in-app purchases available.

### Is Calorie Ledger Book free?

Calorie Ledger Book is free to download, with in-app purchases available.

### Do FastFlow or Calorie Ledger Book have ads?

Neither FastFlow nor Calorie Ledger Book shows ads.

### Which is updated more often, FastFlow or Calorie Ledger Book?

FastFlow ships an update every 4 months, and Calorie Ledger Book every 9 days. Most recently, FastFlow was updated on October 30, 2026 and Calorie Ledger Book on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*